﻿<p>This enumeration is used to identify the primary purpose of performance history.  The <em>IfcPerformanceHistoryTypeEnum</em> contains the following:</p>
<ul> 
<li><b>USERDEFINED</b>: User-defined.</li>
<li><b>NOTDEFINED</b>: Undefined.</li>
</ul> 
    
<blockquote class="history">
HISTORY&nbsp; New enumeration in IFC4
</blockquote>
